Portable loudspeaker



FIG. 1 is a perspective view of a portable loudspeaker showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof, the rear view being a mirror image thereof;

FIG. 4 is a right view thereof; and,

FIG. 5 is a left view thereof.

The portions of the portable loudspeaker shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a portable loudspeaker, as shown and described. 